Science & Mathematics - 11 December 2007

2007-12-11 23:54:28 · 9 answers · asked by derick b 1 in Mathematics

I need about 5-6 lines of information on the following things used in agriculture. It can be about what they are used for (related to agricluture), what they are made of (wood, iron etc.) etc...
1. trowel
2. leveller
3. combines
4. knapsack sprayer
5. harvesting machine/ harvesters
6. jute bags

2007-12-11 23:52:36 · 6 answers · asked by dsnygal18 1 in Agriculture

they have I-2 on one side,they are small white oblong kind of like a caplet

2007-12-11 23:51:43 · 10 answers · asked by julie m 1 in Medicine

2007-12-11 23:46:13 · 6 answers · asked by monu p 1 in Geography

2007-12-11 23:45:31 · 2 answers · asked by Anonymous in Chemistry

I need a map of Great Britain and one of France showing much detail, ie footpaths. I have been searching the web for days trying to find an on-line or paper map that meets my requirements, all I can find is road maps on such a large scale. Please can someone help?

2007-12-11 23:45:29 · 12 answers · asked by Anonymous in Geography

2007-12-11 23:41:36 · 5 answers · asked by Andy I 2 in Zoology

2007-12-11 23:41:30 · 6 answers · asked by derick b 1 in Mathematics

Once it starts boiling, will heating it longer make it any hotter, or am I just wasting time and energy?

2007-12-11 23:32:37 · 5 answers · asked by HoyaDoc 4 in Chemistry

They found a friend of mine that had been dead for a week or more sitting on the couch watching T.V. I was told that I didn't want to go see the body. Things like that do not bother me. Would there have been a smell? There were two cats in there with her all this time. What exactly would she look like & can you go see them at the City Morgue?

2007-12-11 23:25:55 · 4 answers · asked by J.J. 1 in Biology

A U-tube open at both ends is partially filled with water. Oil having a density of 750 kg/m^3 is then poured into the right arm and forms a column 5.00 cm in height.

The right arm is shielded from any air motion while air is blown across the top of the left arm until the surfaces of the two liquids are at the same height. Determine the speed of the air being blown across the left arm. (The density of air is 1.29 kg/m^3.)

2007-12-11 23:25:05 · 1 answers · asked by secondaryhoper 1 in Physics

what are humans emiting into the environment to comtribute to the global warming effects.

2007-12-11 23:17:18 · 7 answers · asked by Anonymous in Earth Sciences & Geology

for science mid term tommorow

2007-12-11 23:11:54 · 1 answers · asked by Anonymous in Chemistry

How does motion occur at the subatomic-level? Could a subatomic-particle theoretically move a distance smaller than itself?

Sorry, I'll rephrase that.

If you analyzed the motion of an object, for instance, what's the smallest theoretically possible distance it could move? What I mean is, wouldn't you eventually get to a point so small that it just "appears" in a different distance, much like in examining the frames of a film?

I have an inkling feeling no-one will understand what I'm asking here.

2007-12-11 23:08:31 · 4 answers · asked by gl.fraenzi 2 in Physics

Remeber reading that this is based on the theory of relativity. This means that even if we did reach such amazing speed - it would take around 20,000+ years to reach another galaxy or another planet. Considering this how can it be possible for UFOs (if at all its true) to visit us (it will take the same period )
for them too)

Does this means that this UFO businees is 100% fake?

2007-12-11 23:02:00 · 14 answers · asked by spice 5 in Astronomy & Space

Consider the following statement:

If f:[a,b] -->R (a and b in R) is continuous and f(a) < f(b), then [a, b] contains a subinterval where f is strictly increasing.

Is this true? So far, I could neither prove nor find a counter example.

If, instead of strictly increasing, we admit f only monotonically increasing, then does anything change?

2007-12-11 22:59:40 · 7 answers · asked by Steiner 7 in Mathematics

why do balloons expand when it is exposed to hot air and why do balloons shrink when it is exposed to cold air

2007-12-11 22:59:21 · 4 answers · asked by Anonymous in Chemistry

how is it that is travelling from west to east by air the journey you lose a day when crossing the internatoional date line but at the same time you arrive 2 days later.

i`ve been looking at flights and if you leave on say the 1st you arrive on the 3rd how can this happen if you lose a day

2007-12-11 22:59:10 · 3 answers · asked by Anonymous in Geography

do yah know?

2007-12-11 22:54:09 · 12 answers · asked by ;) 2 in Geography

2007-12-11 22:47:35 · 3 answers · asked by Anonymous in Geography

Speed of Propagation vs. Particle Speed.

The equation
y(x,t)=Acos2(pi)f((x/v)-t)

may be written as

y(x,t)=Acos[(2pi/lambda)(x-vt)]

Use the last expression for to find an expression for the transverse velocity of a particle in the string on which the wave travels

Please help....i've been stuck on this forever...=)

2007-12-11 22:45:47 · 2 answers · asked by sandymandy 1 in Physics

Thanks to those of you who replied to my first question. As there appears to be more than one answer, I'll clarify a little. The HCl was ordered by a colleague. I wanted 0.1M bench acid for school use but he ordered a litre of 35% HCl (That's what it says on the bottle). As a biologist who's too lazy to work out the molarity based on the molecular mass of HCl, I thought I'd ask you kind people... So am I right in thinking that it's around 10-12molar? That's a lot of dilution for me to do! I thought it was strong when I opened the bottle and chlorine gas appeared!

2007-12-11 21:59:15 · 3 answers · asked by MyOrchid 1 in Chemistry

does anyone know the reasons/evidence for having reason to believe the moon landings were fake?

2007-12-11 21:57:29 · 17 answers · asked by gene 2 in Astronomy & Space

2007-12-11 21:51:14 · 3 answers · asked by mr e 1 in Chemistry

4 - trivia answer

2007-12-11 21:47:03 · 9 answers · asked by brown eyes 1 in Geography

2007-12-11 21:41:51 · 3 answers · asked by Anonymous in Mathematics

1). Determine ∆H˚ for the reaction

Zn(solid) + 2H^+(aqueous) -----> Zn^2+(aqueous) + H2(subscript)(gas)

2) From the following equations and enthalphy change:

a) (∆H˚ rxn= -393.585) C(graphite) + O2(subscript)(gas) -----> CO2(subscript)(gas)

b) (∆H˚ rxn= -2858) H2(subscript)(gas) + ½O2(subscript)(gas) -----> H20(subscript is 2)(liquid

c) (∆H˚ rxn= -2598.8) 2C2H2(subscript are 2nd and 3rd "2")(gas)+5O2(subscript)(gas) -----> 4CO2(subscript)(gas) + 2H2O(subscript is 2nd "2")(liquid)


3) Calculate the ∆H˚ of C2H2(subscript is 2) from its 2C(graphite) + H2(subscript)(gas) -----> C2H2 (subscript is 2)(gas)

2007-12-11 21:21:20 · 1 answers · asked by Janiper 1 in Chemistry

2007-12-11 21:13:19 · 22 answers · asked by inapickle 1 in Geography

What do you guys think about Alexis Lemaire?
A genius?

2007-12-11 21:06:47 · 11 answers · asked by jayjay 3 in Mathematics

from which organism's eye has the human eye advanced from?
is the eye of other primates different from ours?

2007-12-11 20:58:45 · 5 answers · asked by Anonymous in Zoology